Automotive Ac System Pressure Chart

R134a pressure gauge chart this chart details how ambient temperature correlates with the system refrigerant charge pressure and how it affects high and low side psi readings.

Automotive ac system pressure chart.

For a general reference you can check out this chart of r 134a system pressures. The warmer it is outside the higher the pressure will be. With the a c turned off on a cold day the pressure will be low on a hot day the pressure will be high. A c pro is the easy diy car a c repair that saves time money.

When an air conditioning system loses its ability to cool properly it may be necessary to recharge the system with new refrigerant keep reading for a r 134a a c pressure chart and steps on how to recharge the a c system when the system is low on pressure or has been vacuumed out following a repair. Static pressure is the pressure with the system at rest compressor off for at least 30 mins. Pressures can vary from car to car based on the system and the pressure in your system will also vary with the ambient temperature. The system should be recovered vacuumed min 20 minutes and charged.

It can be used for recharging refrigerant or to diagnose an a c system based on pressure readings from your gauges. Teo on july 23 2018. The gauges readings will depend on the ambient temperature. With the engine off for at least 30 minutes read the low and high pressure.

The other usual cause of high pressure readings is that the entire ac system may be overcharged which happens either when there is too much refrigerant or too much oil. The following table presents the possible inferences and the actions that can be taken based on the level of pressure registered by the high and low pressure gauges. The most ideal pressure readings are around 150 high and 30 low. Remember venting 134a refrigerant into our atmosphere is illegal and bad for our environment.

This simple fix recharges the r 134a freon stop leaks gets your car a c cold again. System pressure chart get a quick look at what an average a c system looks like along with the compressor manufacturer and what the specific r 134a requirements are for your car. In this case pressure must be released by a certified mechanic. My car ac static pressure is not equal.

The ambient temperature is 32 degree. This could be a bad txv h block or blocked orifice tube depending on your system. R 134a temperature pressure chart tabla de temperaturas y lecturas. Attach to the hoses and gauge set to the high and low side ports of your ac system.

However it s not always that the system is actually overcharged. Start your ac pressure readings diagnostic by measuring the system s static pressure.